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A randomized, masked, crossover, clinical trial of the efficacy and safety of nebulized albuterol sulfate and dexamethasone sodium phosphate in asthmatic horses. Nebulization of injectable dexamethasone sodium phosphate (DSP; 0.01 mg/kg) to horses with severe equine asthma (SEA) was previously found to be ineffective. Horses with SEA have marked bronchoconstriction that decreases peripheral lung deposition of nebulized drugs. Administration of a bronchodilator immediately before nebulizing dexamethasone may improve efficacy. Objective: Evaluate the therapeutic effects and optimal dose of nebulized DSP after nebulized albuterol in horses with SEA. Methods: Seven horses with SEA from a research herd. Methods: In this masked randomized crossover trial, h...
Equine neorickettsiosis: A global perspective of the natural habitat of the bacteria and clinical disease. Equine neorickettsiosis (EN) is an infectious, non-contagious systemic disease of horses caused by the closely related obligatory intracellular bacterial species Neorickettsia risticii and N. findlayensis. Clinical cases are considered endemic in multiple regions across the United States and Canada, as well as in parts of South America, including Uruguay and Brazil. Neorickettsia spp. are obligate endosymbionts of digenean trematodes, which have complex life cycles involving a molluscan first intermediate host, a wide range of invertebrate or vertebrate second intermediate hosts, and a vertebr...
Equine autologous platelet concentrate is a leukocyte-rich platelet-rich plasma with a high interleukin-1Ra-to-interleukin-1β ratio and high transforming growth factor-β1 concentration. To quantify platelets, leukocytes, cytokines, and growth factors in ProVet autologous platelet concentrate (APC). We hypothesized that APC would contain significantly increased leukocytes and platelets compared to whole blood and significantly increased concentrations of anti-inflammatory cytokines and growth factors compared to serum. Unassigned: Blood was obtained from 6 horses and processed to produce APC. Leukocyte and platelet concentrations were quantified in whole blood and APC. Cytokines, including interleukin (IL)-1β, IL-4, IL-6, IL-10, tumor necrosis factor-α, and IL-1Ra, and growt...
Reference intervals for serum macro- and microminerals in clinically healthy horses in Northwestern Spain: Influence of age, sex, breed and diet. Serum mineral concentrations are key indicators of nutritional status, metabolic function and health in horses; however, contemporary reference intervals (RI) derived from large, well-characterised populations remain scarce. Objective: To establish serum RI for macro- and microminerals in clinically healthy horses in Northwestern Spain and to evaluate the influence of sex, age, breed and diet on mineral status. Methods: Blood samples were collected from clinically healthy horses (n = 211), and serum concentrations of essential macrominerals (calcium [Ca]; phosphorous [P]; magnesium [Mg]; sodiu...
Extracorporeal shock wave therapy in equine and canine practice. To describe the proposed mechanism of action of shock wave therapy and discuss treatment considerations and guidelines for use in equine and canine practice. Unassigned: Client-owned animals with owner consent. Unassigned: Shock wave therapy is proposed to stimulate healing by generating forces that cause cells to undergo microtrauma and release anti-inflammatory cytokines and growth factors into the treated tissues. While the 4 types of shock wave therapies are discussed, electrohydraulic and piezoelectric are described in detail, as they are most utilized in veterinary medicine for the treat...
QT interval and cardiac restitution dynamics in racehorses: Observations during maximal effort. Sudden cardiac death is a leading cause of athletic death in both humans and horses, making racehorses a potentially valuable model for investigating sudden cardiac death. Cardiac restitution ratio (QT/TQ interval) is used to assess arrhythmia risk in humans, but investigations in athletes are scarce. The objective was to characterize QT interval and cardiac restitution ratio in Thoroughbred racehorses during maximal effort. Automated restitution analysis was performed using 2709 pairs of cardiac cycles from 30 Thoroughbred horses during races. Cardiac cycles were obtained during: pre-race; ac...
Analysis of lipid mediator profiles in the blood of horses with equine asthma using UPLC-MS/MS. Equine asthma (EA) is a chronic inflammatory disease of the lower respiratory tract in horses, which is mainly triggered by dusty hay. EA is becoming increasingly acknowledged as a valuable animal model for studying human asthma. Research on the pathogenesis of EA has primarily focused on the associated cells and cytokines involved. However, the role of inflammation-related lipid mediators (LM) in the development and progression of equine asthma remains elusive. LMs are categorized into pro-inflammatory arachidonic acid (AA)-derived leukotrienes (LTs) and prostaglandins (PGs), as well as infla...
Geriatric Horses in Germany: Approaches to Nutrition, Housing and Overall Care. Changes in horse management and use mean that a growing number of horses are now kept into older age, while age-specific management practices for these animals remain insufficiently documented. This cross-sectional online survey aimed to describe the housing, feeding, activity, behaviour and care routines of horses aged 20 years and older in Germany, based on 923 questionnaires completed by horse owners about their senior horses. Most horses maintained regular tactile social contact (87.4%, = 805), and over half were still ridden or driven (61.6%, = 566). However, the proportion of horses in...
What happened after the epidemic? Equine influenza surveillance sheds light on sources and seasonal risk in the United Kingdom. The epidemiology of equine influenza (EI) in the United Kingdom has not been systematically described since the 2019 epidemic. Objective: To summarise UK EI surveillance (2020-2024), quantify outbreak seasonality and assess movement-related sources. Methods: Retrospective observational analysis of national surveillance and horse importation data. Methods: Epidemiological data for laboratory-confirmed EI cases in the United Kingdom were collated. Outbreaks (EI-infected premises) were defined as one or more laboratory-confirmed cases on the same premises within a 4-week period. Monthly outbreak ...
Survey on Faecal Microbiota Transplantation and Probiotic Use in Equine Practice in France and Belgium. Faecal microbiota transplantation (FMT) and probiotics are used in equine practice. Understanding veterinarians' perceptions and practices is crucial for effective implementation. Objective: (1) Evaluate the prevalence, usage patterns and perceived effectiveness of probiotics and FMT among equine veterinarians in France and Belgium. (2) Assess their knowledge, practices and influencing factors across demographics and settings. (3) Explore links between FMT protocols and treatment satisfaction. Methods: Cross-sectional survey. Methods: An online survey collected demographic data and responses o...
Plasma and Urinary Elimination Profiles of Medetomidine Metabolites in Horses for the Purpose of Doping and Medication Control. Medetomidine, an α₂-adrenergic agonist, is widely used as a sedative in horses. While its pharmacological effects are established, limited data exist on elimination of its metabolites, 3'-hydroxy medetomidine (HMD) and 3'-carboxy medetomidine (CMD), which are of regulatory interest. HMD is currently targeted in plasma and urine under International Screening Limits (ISLs) established by the International Federation of Horseracing Authorities (IFHA). In this study, seven Thoroughbreds received 6.3 μg/kg of medetomidine intravenously. Blood and urine were collected for 96 h and analyzed b...
Relationship between the duration of endometrial edema and reproductive parameters of estrus, diestrus, and fertility in mares: a field study. The duration of endometrial edema has been positively correlated with uterine receptivity and likelihood of pregnancy. Therefore, this study aimed to evaluate whether there is a relationship between the duration of endometrial edema (DEdema) and other key parameters of the estrous cycle: maximum edema (MEdema), largest follicle diameter (LPF), corpus luteum and uterine tone on day 5 post ovulation (CLD5 and TD5), progesterone concentration (P4) and fertility. A total of 88 cycles from 36 mares were evaluated and divided into Short Estrus (SE), Long Estrus (LE), Inseminated (AI) and Non-insemin...
Re-emergence of equine glanders in Mongolia based on region-wide serosurveillance. Glanders, a zoonotic disease caused by , has re-emerged in Mongolia after decades of control. We conducted nationwide serosurveillance from 2021 to 2024 to assess the prevalence and geographic distribution of glanders. Using random 3-stage cluster sampling, we collected 3,001 horse serum samples from 332 herds. Those herds were in 46 soums (administrative districts equivalent to counties) in 13 provinces and in 3 districts in Ulaanbaatar. Sera were tested using the complement fixation test, and positive results were confirmed by immunoblotting and ELISA. Overall seroprevalence was 1.03% (95% C...
Targeting Toll-like Receptor 2: synthetic diacylated lipopeptides polarize equine macrophages towards a pro-inflammatory phenotype. Toll-like receptors (TLRs) are a group of pattern recognition receptors (PRRs), that play critical roles in initiating host immune defenses. TLR-2 agonists can activate innate immune cells and thus are attracting increasing attention as prophylactic and/or therapeutic agents against infectious diseases or in cancer immunotherapy. In this work, the impact of three synthetic diacylated lipopeptides (Mag-Pam2Cys_P48, MagPam2Cys_P80, and Mag-Pam2Cys_MAG1000) on equine monocyte-derived macrophages (moMΦ) phenotype and functionality was thoroughly investigated. MoMΦ were generated from circulatin...
Metatranscriptomics reveals the horse gut RNA virome and a viral sharing network with human and domestic animals. RNA viruses, a unique class of life forms, are widely distributed in nature and pose potential health risks. Monitoring the gut RNA virome in livestock is a crucial component of global health surveillance. As important companion animals, horses play a vital role in transportation and make significant contributions to various cultural and economic activities. Nevertheless, the characteristics of horse gut RNA viruses remain largely uncharted. Unassigned: In this study, we used metatranscriptome sequencing and bioinformatics methods to characterize viruses within the gut contents of 16 horses sp...
Acute effect of hippotherapy applied on different sitting surfaces in children with special needs. PurposeThis study aimed to assess the acute effects of hippotherapy performed on different seating surfaces on sitting balance and walking speed in children with special needs.Materials and MethodsChildren aged 3-18 years with special needs were included. Participants were assigned to three groups: Group 1 (Saddle), Group 2 (No saddle, direct horse contact), and Group 3 (Saddle with additional texture material). Each group received a 30-min hippotherapy session in a riding arena. Sitting balance was measured with the BeCure balance system, and walking speed was assessed using the 10-meter walk...
Untargeted LC-HRMS metabolomic analysis reveals exercise-induced biochemical alterations in endurance Arabian horses. BACKGROUND: Endurance exercise induces extensive metabolic remodeling in equine athletes, yet the global metabolic responses in purebred Arabian horses remain insufficiently characterized. This study aimed to investigate plasma metabolomic alterations associated with prolonged aerobic exercise using untargeted liquid chromatography–high-resolution mass spectrometry (LC-HRMS). RESULTS: Plasma samples from twelve trained Arabian horses were collected before and after 80-km endurance rides and analyzed using both hydrophilic interaction (HILIC) and reversed-phase (C18) chromatographic platforms...
Application of a framework to mitigate the risk of surgical site infection after exploratory celiotomy in horses: A retrospective study. To describe the methodology used to identify the contributors to a perceived sudden increase in exploratory celiotomy surgical site infections (SSI) and complications at the North Carolina State University Veterinary Teaching Hospital (NCSU VTH) between 2019 and 2020 and evaluate the effect of the designed intervention up to 4 years after its implementation. Methods: Case-control retrospective study over a five-year period. Methods: A total of 448 horses that underwent exploratory celiotomy for the treatment of acute abdominal pain were included. Methods: Medical records of horses that under...
Long term safety and efficacy of a functionalized nanogel with endothelin-1 and bradykinin receptor antagonist peptides for treatment of osteoarthritis of the metacarpophalangeal and distal interphalangeal joints in horses: a descriptive clinical pilot study. Intra-articular drug delivery systems (DDS) are emerging as promising therapies for osteoarthritis (OA), yet their efficacy in spontaneous clinical cases remains largely untested. This uncontrolled, descriptive pilot study was designed to provide a proof of concept for the feasibility, safety, and preliminary clinical effects of intra-articular administration in sport horses with naturally occurring OA. The study involved a peptide-functionalized nanogel composed of chitosan and hyaluronic acid, delivering endothelin type A (BQ-123) and bradykinin B1 (R-954) receptor antagonists, which have pr...
Horse immune response of recombinant Lawsonia intracellularis vaccine: Assessing the immunomodulatory impact of probiotic supplementation. Equine proliferative enteropathy (EPE), caused by Lawsonia intracellularis induces intestinal epithelial hyperplasia, resulting in malabsorption, weight loss, colic, and diarrhea. Despite its clinical and economic importance, no equine-specific vaccine is commercially available. Recombinant subunit vaccines are a safe and scalable alternative; however, their immunogenicity often requires improvement. Probiotic supplementation with Bacillus toyonensis may act as an immunomodulatory strategy to potentiate vaccine efficacy. This study aimed to evaluate the immunogenicity of a recombinant protein ...
Systematic review and meta-analysis of adult multipotent stromal/stem cell treatment for equine tendinopathy and desmopathy. Over the last few decades, cell and cell-based therapies emerged as treatment options for equine tendinopathy and desmopathy. The objective of this study was to critically evaluate outcomes following treatment of equine tendinopathy or desmopathy with adult multipotent stromal/stem cells (MSCs). Unassigned: The PubMed and Web of Science databases were searched for "equine/horse," "tendon/tendinopathy/tendonitis/ligament/ligamentopathy/desmopathy/desmitis," "stem/stromal/mesenchymal/multipotent," and "cell" from January 2001 to June 2025. Studies were identified according to PRISMA guidelines, ...
How Inflamed Is the Horse in Training? Insights into Exercise-Induced Acute Phase Response in Endurance Horses. The article aimed to review the current literature analysing the complexity of an exercise-induced acute phase response in athletic horses undergoing intense training and endurance competitions. Since the endurance discipline demands physical fitness, exceptional health and excellent adaptation to an increasing workload, diagnostic methods of assessing the factors mentioned above are highly required. Athletic horses in endurance training undergo numerous metabolic but also immune adaptations, including changes in pro-inflammatory and anti-inflammatory cytokine levels. The inflammatory reaction...
Gaps Between Awareness and Prevention of West Nile Virus Among Horse Owners in an Endemic Country: A Cross-Sectional Study from Romania. West Nile virus (WNV) circulates endemically in Romania, yet prevention of WNV infection in horses largely depends on owner-driven decisions that require accurate risk perception and veterinary guidance. A cross-sectional online survey was carried out between May and November 2025 to evaluate the knowledge, attitudes, and preventive practices (KAP) regarding WNV among 227 horse owners from various Romanian regions. In total, 67.4% of respondents had previously heard of WNV. The main transmission route was correctly identified as mosquito bites by 49.8% of participants, while 32.2% answered "do...
Antibodies in plasma and blood cells of horses. Understanding the distribution of antibodies in the bloodstream is critical for advancing diagnostic and therapeutic approaches in veterinary medicine and comparative immunology. While most studies have focused on plasma antibodies, the presence and role of membrane-bound immunoglobulins remain underexplored, particularly in equine species such as the Jabe horse. Unassigned: This study aimed to analyze the amount of antibodies in the plasma and blood cells of Jabe horses for their potential future use. Unassigned: Blood samples were collected from Jabe horses and separated into plasma and cell...
The efficacy of psyllium combined with aloe vera in treating sand accumulation in equine intestines. Sandy enteropathy is more common in horses living in sandy environments, such as those in Saudi Arabia. Sand accumulation in the intestines can be eliminated and prevented by administering psyllium husk. Unassigned: This study focuses on the combination of psyllium and aloe vera extract, known for its protective and anti-inflammatory properties. Unassigned: Fourteen Arabian horses with naturally acquired sand accumulation were randomly assigned to two groups: the psyllium group (PG, = 7) and the psyllium and aloe vera group (PAG, = 7), both of which were treated daily for 7 days. Efficacy wa...
Evaluation of multiple methods for the diagnosis of equine Hemomycoplasmosis in Misan, Iraq. Hemomycoplasmosis caused by Hemotropic mycoplasmas, or Hemoplasma, which were previously classified as Eperythrozoon spp., are uncultivable parasites that infect the cell wall of erythrocytes in many susceptible mammals, including cattle, buffalo, goats, sheep, horses, cats, dogs, and even camels, and can be transmitted to humans. Unassigned: The purpose of the present work is to display and evaluate the different diagnostic criteria for detecting the most precise method for diagnosing Hemomycoplasma in horses. Unassigned: Different diagnostic methods were used to diagnose equine Hemomycoplasm...
Cryptophthalmia, microphthalmia, oronasal malformation, and hydrocephalus in an aborted equine fetus with umbilical torsion in the state of Mato Grosso, Brazil. Facial abnormalities and brain defects in aborted equine fetuses are rarely reported, and the causes that predispose the occurrence of this condition are difficult to identify. This work reports the morphological and tomographic findings of a case of cryptophthalmia, microphthalmia, oronasal malformation, and hydrocephalus in an aborted equine fetus with umbilical cord torsion in the state of Mato Grosso, Brazil, from a primiparous Quarter Horse female, with 7 months of gestational age. The occurrence of miscarriage was associated with compromised maternal-fetal blood flow due to umbilical cor...
Temporal characterization of conditions that promote functional capacitation of stallion sperm. Equine in vitro fertilization (IVF) has historically been challenged due to lack of conditions that promote functional capacitation of stallion sperm. Capacitation success is often attributed to prolonged sperm incubation requirements. Advances to equine IVF are hindered by incomplete characterization of conditions that promote the functional capacitation of stallion sperm over time. Herein, we describe conditions that promote the functional capacitation of fresh, cooled, and frozen-thawed stallion sperm isolated by Percoll, Swim-Up, or Microfluidics (VetMotl). Fresh (diluted sperm) and previo...
Effect of Equine-assisted Biographical Work (EABW) in older adults with subclinical depression: a randomized controlled trial. Preventive approaches for depression in adults aged 50 years and older have received little attention, despite increasing needs arising from demographic changes. In particular, subclinical depression is often underdiagnosed and associated with anxiety, a poorer quality of life, and greater need for assistance from the healthcare system. This multicentre, randomised, controlled phase III trial investigated if Equine-Assisted Biographical Work (EABW) is effective to improve subclinical depression. Qualified sites in Germany enrolled 52 participants ≥ 50 years (Full Analysis Set (FAS),...
Rocio virus sustained circulation in Brazil: first infection case in a horse highlights the need for enhanced arbovirus surveillance. Rocio virus (ROCV), a neurotropic arbovirus of the genus, caused Brazil’s largest encephalitis outbreak in the 1970s but has since been rarely detected. We report the first ROCV encephalitis clinical case after nearly 40 years and isolated and sequenced the virus from CNS tissue of a horse. Metatranscriptomics enabled full-genome sequencing, revealing divergence from the reference sequence at an evolutionary rate of 5.8–7.0 × 10⁻⁴, consistent with . Thirty-one non-synonymous substitutions were identified, with the envelope protein most affected. Findings indicate ROCV cryptic circula...
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